Vacillate between
在…之间动摇不定
🧩 词语组成解析
between
[bɪ'twin]
prep. 在…之间;私下，暗中;在…中任择其一;来往于…之间;
adv. 当中，中间;
🗣️ 情景例句
Thank you. The same to you.
谢谢。圣诞快乐！
Who cares!
我不在乎！
shape in only two dimensions.
形态只有两种尺度。